2027 head-to-head · Midsize Car
2027 BMW 5 Series Plug-in Hybrid vs Kia K4
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
AWD · 3.0L 6-cyl turbo · 8-speed automatic · 68 MPGe + 25 MPG
The 2027 Kia K4 is the cheaper one to run. Driving 15,000 miles a year with 18¢/kWh electricity, $3.95/gal premium gas and $3.10/gal regular gas, it costs about $1,409 a year to fuel (33 MPG), versus $1,714 for the 2027 BMW 5 Series Plug-in Hybrid (68 MPGe + 25 MPG). That's roughly $304 a year, or about $1,522 over five years.
Your numbers
Change these to match your driving and local prices. Every figure and chart on this page updates.
Fuel cost over 10 years
- BMW 5 Series Plug-in Hybrid
- Kia K4
Side by side
| BMW 5 Series Plug-in Hybrid | Kia K4 | |
|---|---|---|
| $1,714 | Your annual fuel cost | $1,409 |
| 68 MPGe + 25 MPG | Combined efficiency | 33 MPG |
| 65 MPGe / 22 MPG | City | 29 MPG |
| 73 MPGe / 28 MPG | Highway | 39 MPG |
| 49 kWh | Electricity use (kWh/100 mi) | — |
| 430 mi | Driving range | — |
| 34 mi | All-electric range | — |
| 98 cu ft | Passenger volume | 99 cu ft |
| 14 cu ft | Cargo volume | 15 cu ft |
| 133 g/mi | Tailpipe CO₂ (g/mi) | 269 g/mi |
| 7/10 | EPA fuel economy score | 6/10 |
| 9/10 | EPA greenhouse gas score | 6/10 |
| 2 hrs | Charge time at 240V | — |
| Plug-in hybrid | Powertrain | Gas |
| Premium gas + electricity | Fuel | Regular gasoline |
| 3.0L 6-cyl turbo | Engine / motor | 2.0L 4-cyl |
| 8-speed automatic | Transmission | CVT |
| AWD | Drivetrain | FWD |
✓ marks the better value. EPA scores run 1–10 (10 is best). Volumes come from the EPA interior volume index and aren't published for every body style.
BMW 5 Series Plug-in Hybrid vs Kia K4 across model years
- BMW 5 Series Plug-in Hybrid
- Kia K4
Annual fuel cost of the most efficient configuration of each model year, at your prices. Click a point to open that year.
How they differ
Per EPA interior volume figures, the Kia K4 has more cargo space (15 vs. 14 cu ft).
Among 12 2027 midsize cars, the BMW 5 Series Plug-in Hybrid ranks 7th and the Kia K4 5th for lowest fuel cost.
The powertrains differ: the BMW 5 Series Plug-in Hybrid is a plug-in hybrid, while the Kia K4 is a conventional gas model.
Frequently asked questions
Which is more fuel-efficient, the 2027 BMW 5 Series Plug-in Hybrid or the 2027 Kia K4?
Measured by cost to drive, the Kia K4. The BMW 5 Series Plug-in Hybrid is rated 68 MPGe + 25 MPG combined and the Kia K4 33 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2027 BMW 5 Series Plug-in Hybrid vs. the Kia K4 per year?
At 15,000 miles a year with 18¢/kWh electricity, $3.95/gal premium gas and $3.10/gal regular gas, about $1,714 for the BMW 5 Series Plug-in Hybrid and $1,409 for the Kia K4.
Which has more cargo space?
The Kia K4, with 15 cu ft of luggage volume versus 14 cu ft (EPA interior volume index).
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